I saw the film and while the enviro-message might be there in a small way, there are other messages, too...
The opening shot of earth shows a windmill farm buried in trash. To ME, that is a message that “none of this environmental stuff makes sense.”
Also, the bulk of the story is about friendship and love being more important than technology. I went away smiling from the film.
BINGO
Love, friendship, take care of your trash, get off your butt and DO something with your life, DON’T be a TV-screen/PC-screen addict, interact with people face to face...
...these are BAD messages?